#include<stdio.h>
int main()
{
    int n;
    while(scanf(" %c",&n)==1)
    {
        if(n>='a'&&n<='z'||n>='A'&&n<='Z')
            printf("%c is an alphabet.\n",n);
           
        else
            printf("%c is not an alphabet.\n",n);
    }

}
